A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 4140-01-451-5471
NSN 5835-00-711-3371
NSN 6645-01-132-6657
NSN 6150-01-016-1780
NSN 5855-01-135-9664
NSN 6240-00-141-6143
NSN 5950-00-097-9565
NSN 6150-00-014-2921
NSN 5945-01-648-2231
NSN 7035-01-516-0578
NSN 2925-01-460-1601
NSN 6220-00-515-6998